<div id="myModal">
    <div class="modal-header">
        <h3>Add to collection</h3>
        <br />
        <div>
            <p>We can add this to a temporary collection for you.</p>
            <p>For the most features you'll want to sign in or create an account.</p>
        </div>
    </div>
    <div class="modal-body">
        <form action="/collections/new" data-validate="parsley" id="add_form">
            <input type="hidden" name="traits" value="{{ traits }}" />
            <button type="submit" name="anonymous_add" class="btn btn-large btn-block btn-primary">Continue without signing in</button>
            <button type="submit" name="sign_in" class="btn btn-large btn-block">Sign in or create an account</button>
        </form>
    </div>
</div>

<script>
    $('#add_form').parsley();
</script>